This is a Farrows Mica Heater II. Unlike heaters that are placed inside the cage to warm a specific area, the Mica Heater uses far-infrared rays to warm your pet from the core, reacting with the water in their body, no matter where they are in the cage. It's useful not only in the cold season but also when using air conditioning in the summer, and for elderly or young rabbits who have difficulty regulating their body temperature when they are unwell. It worked fine until this winter, and I have reconfirmed its operation for this listing. There are some scratches and dirt. As shown in the third image, the cord has about four places where my rabbit played with it. It is usable, but you may want to replace it with a new one for safety. Please look at the images carefully and make your decision before purchasing, as this is a used item. Size: Approximately 35cm x 46.6cm x 4cm Weight: 1950g (body 1045g) Power Consumption: 60w